Intact quasiparticles at an unconventional quantum critical point

@article{Sutherland2015IntactQA,
  title={Intact quasiparticles at an unconventional quantum critical point},
  author={Michael L Sutherland and Eoin C. T. O’Farrell and William Henry Toews and J. L. Dunn and Kentaro Kuga and Satoru Nakatsuji and Yo Machida and Koichi Izawa and Robert W. Hill},
  journal={Physical Review B},
  year={2015},
  volume={92},
  pages={041114}
}
We report measurements of in-plane electrical and thermal transport properties in the limit T → 0 near the unconventional quantum critical point in the heavy-fermion metal β-YbAlB4. The high Kondo temperature TK � 200 K in this material allows us to probe transport extremely close to the critical point, at unusually small values of T/T K < 5 × 10 −4 . Here we find that the Wiedemann-Franz law is obeyed at the lowest temperatures, implying that the Landau quasiparticles remain intact in the… 

Figures from this paper

Exploring heavy fermions from macroscopic to microscopic length scales
Strongly correlated systems present fundamental challenges, especially in materials in which electronic correlations cause a strong increase of the effective mass of the charge carriers. Heavy
Low-Temperature Thermal Conductivity of the Two-Phase Superconductor CeRh2As2
CeRh2As2 is a rare unconventional superconductor (T c = 0.26 K) characterized by two adjacent superconducting phases for a magnetic field H‖c-axis of the tetragonal crystal structure.
Viewpoint Rescuing the Quasiparticle
A Viewpoint on: Thermal Conductivity through the Quantum Critical Point in Y bRh2Si2 at Very Low Temperature M. Taupin, G. Knebel, T.D. Matsuda, G. Lapertot, Y. Machida, K. Izawa, J.-P. Brison, and
Interplay between unconventional superconductivity and heavy-fermion quantum criticality: CeCu2Si2 versus YbRh2Si2
ABSTRACT In this paper the low-temperature properties of two isostructural canonical heavy-fermion compounds are contrasted with regards to the interplay between antiferromagnetic (AF) quantum
Kondo hybridization and quantum criticality in β -YbAlB 4 by laser ARPES
We report an angle-resolved photoemission (ARPES) study of $\beta$-YbAlB$_4$, which is known to harbor unconventional quantum criticality (QC) without any tuning. We directly observe a quasiparticle
Viewpoint: Rescuing the Quasiparticle
Experiments with heavy-fermion materials show that quasiparticles exist at the critical point of a quantum phase transition.
Strong in-plane anisotropy in the electronic structure of fixed-valence β−LuAlB4
The origin of intrinsic quantum criticality in the heavy-fermion superconductor $\beta$-YbAlB$_4$ has been attributed to strong Yb valence fluctuations and its peculiar crystal structure. Here, we

References

SHOWING 1-10 OF 35 REFERENCES
"J."
however (for it was the literal soul of the life of the Redeemer, John xv. io), is the peculiar token of fellowship with the Redeemer. That love to God (what is meant here is not God’s love to men)
Science 331
  • 316
  • 2011
Phys
  • Rev. B 89, 045130
  • 2014
S
  • Wirth et al., Nature (London) 484, 493
  • 2012
E
  • Pearson et al., Nat. Phys. 4, 603
  • 2008
Science 316
  • 1320
  • 2007
Soc
  • Jpn. 84, 024710
  • 2015
Soc
  • Jpn. 34, 639 (1973); J. A. Hertz, Phys. Rev. B 14, 1165 (1976); A. J. Millis, ibid. 48, 7183 (1993). 041114-4 RAPID COMMUNICATIONS INTACT QUASIPARTICLES AT AN UNCONVENTIONAL . . . PHYSICAL REVIEW B 92, 041114(R)
  • 2015
Phys
  • Status Solidi B 250, 425
  • 2013
Phys
  • Rev. Lett. 110, 236402
  • 2013
...
1
2
3
4
...